Chummer
Chummers are giant meaty enemies that quickly chase non-stop after Isaac and will charge towards him when lined up cardinally, only stopping once reaching a wall or obstacle. They will also not take any knockback from Isaac's tears. Upon death they will launch 2 arcing bone projectiles and 3 
Globins or 
Gazing Globins in random directions, and transform into a giant pile of flesh and bones. The chance to spawn a Gazing Globin is much lower than Globins.
The Globins will reform immediately to chase Isaac, while a Chummer in its pile form, remains stationary and is invulnerable. It has a massive range while in this form and if Isaac is within its range, it will periodically lob 4 bone projectiles: 3 in random directions, and 1 always aimed at Isaac's location. If Isaac gets close to a Chummer pile, the 3 other random bone projectiles will be loosely aimed towards him instead. They will not deal contact damage in this form but will block Isaac's tears and can be pushed around. Chummer piles will only die upon clearing the room.
Chummers can rarely be encountered spawning already in their pile form and will behave as usual.
Gallery
Back view of a Chummer...
A Chummer's appearance while charging.
A Chummer in its pile form.
